Laser Retroreflector Experiment on Navstar 35 and 36
MARYLAND UNIV COLLEGE PARK DEPT OF ASTRONOMY
Pagination or Media Count:
In GPS one of the primary errors contributing to positioning inaccuracy is the performance of the on-board atomic clock. To determine and predict the performance of this atomic clock has been a problem due to the ambiguity of the orbital position error and clock uncertainity in the Radio Frequency RF tracking of the navigation signals. The Laser Retroreflector Experiment LRE on-board NAVSTAR 35 and 36 provides a means of separating these ambiguious errors by enabling highly precise and accurate satellite positions to be determined independently of the RF signals. The results of examining onboard clock behavior after removing the orbital position signatures will be discussed. GPS RF tracking data from various Doll and other sites are used to reconstruct the onboard clock data and examine the clock behavior. From these data, the effects of clock performance on GPS positioning performance can examined.
- Lasers and Masers
- Air Conditioning, Heating, Lighting and Ventilating
- Navigation and Guidance